Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6123174 | Apparatus and method for automatically performing fluid changes | John Workings, David Azarewicz, Richard R. Roy, Paul M. Elkin | 2000-09-26 |
| 5685396 | Apparatus for automatically performing engine fluid changes | Paul M. Elkin, John Workings, David Azarewicz | 1997-11-11 |
| 5562181 | Apparatus and method for automatically performing engine fluid changes | Paul M. Elkin, John Workings, David Azarewicz | 1996-10-08 |